The Journal of San Diego History

U.S.-Mexico Boundary Line

Monument No. 1 on the Pacific. The inscription reads: “Initial point of boundary between the United States and
Mexico, established by the Joint Commission 10th October, A.D. 1849, agreeably to the treaty dated at the City of
Guadalupe Hidalgo February 2, A.D. 1848. John B. Weller, U.S. Commissioner. Andrew B. Gray, U.S. Surveyor.”
©SDHS #OP 12794.